Update appcast.xml

Author: intitni

appcast.xml

@@ -3,6 +3,19 @@
   <channel>
     <title>Copilot for Xcode</title>
 
+    <item>
+      <title>0.20.0</title>
+      <pubDate>Tue, 11 Jul 2023 00:45:19 +0800</pubDate>
+      <sparkle:version>200</sparkle:version>
+      <sparkle:shortVersionString>0.20.0</sparkle:shortVersionString>
+      <sparkle:minimumSystemVersion>12.0</sparkle:minimumSystemVersion>
+      <sparkle:releaseNotesLink>
+        https://github.com/intitni/CopilotForXcode/releases/tag/0.20.0
+      </sparkle:releaseNotesLink>
+      <enclosure url="https://github.com/intitni/CopilotForXcode/releases/download/0.20.0/Copilot.for.Xcode.app.zip" length="25106939" type="application/octet-stream" sparkle:edSignature="E3YG/je6bgLDqfHIbINJfTUBuF6dV7Q/zatGkFxnD2SqL5RSyYI32UTGrC8pTfLMbYZThORIP3bI80DdcH+UBw=="/>
+
+    </item>
+
     <item>
       <title>0.19.2</title>
       <pubDate>Mon, 26 Jun 2023 21:56:13 +0800</pubDate>